Place the squash on a plate and cover loosely with plastic wrap. Microwave on high for 2 to 3 minutes, or until the squash begins to soften. Set aside; the squash will continue to steam & soften under the plastic wrap.

In a small bowl, combine the miso, orange juice and soy sauce. Set aside.

In a large sauté pan or skillet over medium to medium-low heat, add the sesame oil. When it is hot, add the microwaved squash, stirring occasionally, and cook for a few minutes until it is tender and any raw taste is gone. Add the miso mixture and stir to mix well.